diff --git a/LLMCode/utils/completion.py b/LLMCode/utils/completion.py
index 55664fe..6165120 100644
--- a/LLMCode/utils/completion.py
+++ b/LLMCode/utils/completion.py
@@ -1,39 +1,40 @@
-import multiprocessing
+import threading
 import openai
 import LLMCode.cfg.completion_params as completion_params
 from . import ANSI_CODE
 from .logger import LOGGER
 
 
-def run_with_timeout(target_function, args=None, timeout=30):
-    pool = multiprocessing.Pool(processes=1)
-    if args is None:
-        result = pool.apply_async(target_function)
-    else:
-        result = pool.apply_async(target_function, args)
-    try:
-        result_value = result.get(timeout=timeout)
-        return result_value
-    except Exception as e:
-        if isinstance(e, multiprocessing.TimeoutError):
-            LOGGER.info(
-                "%s\r⚠ The completion could not be done. %s response lasted more than %s seconds, which is the limit.",
-                ANSI_CODE["yellow"],
-                target_function,
-                timeout,
-            )
-        else:
-            LOGGER.info(
-                "%s\r⚠ The completion could not be done. %s raised the exception %s",
-                ANSI_CODE["yellow"],
-                target_function,
-                e,
-            )
-        pool.terminate()
+def run_with_timeout(target_function, args=(), kwargs={}, timeout=30):
+    result = [None]  # A mutable container to store the function result
+    exception = [None]  # A container to capture exceptions
+
+    def target_wrapper():
+        try:
+            result[0] = target_function(*args, **kwargs)
+        except Exception as e:
+            exception[0] = e
+
+    thread = threading.Thread(target=target_wrapper)
+    thread.start()
+    thread.join(timeout)
+    if thread.is_alive():
+        LOGGER.info(
+            "%s⚠ The completion could not be done. %s response lasted more than %s seconds, which is the limit.",
+            ANSI_CODE["yellow"],
+            target_function.__name__,
+            timeout,
+        )
+        return None
+    if exception[0]:
+        LOGGER.info(
+            "%s⚠ The completion could not be done. %s raised the exception %s",
+            ANSI_CODE["yellow"],
+            target_function.__name__,
+            exception[0],
+        )
         return None
-    finally:
-        pool.close()
-        pool.join()
+    return result[0]
 
 
 # Completion using openai API
diff --git a/LLMCode/utils/document.py b/LLMCode/utils/document.py
index 18dbeec..f0d33fe 100644
--- a/LLMCode/utils/document.py
+++ b/LLMCode/utils/document.py
@@ -137,5 +137,5 @@ def add_msg(msg, where, element, script_content):
                         script_content,
                     )
                     pass
-    with open(script, "w") as python_file:
+    with open(script, "w", encoding="utf-8") as python_file:
         python_file.write(script_content)
diff --git a/requirements.txt b/requirements.txt
index f0dd0ae..360d2ed 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-openai
\ No newline at end of file
+openai==0.28
\ No newline at end of file